4-40 K Lock Nut Zinc and Bake 05NCUP5 Black Zinc and Bake is

Black Zinc and Bake is a durable and reliable washer designed to prevent loosening of bolted joints due to vibration or shock

Its partial threading allows for secure fastening in a variety of materials

The 5/16-18 x 5 1/2 Carriage Bolt Galvanized is a high-quality fastener designed for heavy-duty applications

and other structural applications where strength and durability are paramount

4-40 K Lock Nut Zinc and Bake 05NCUP5 Black Zinc and Bake is4 40 K Lock Nut Zinc and Bake is a type of nut that is used to secure bolts and screws. It is made of steel and has a zinc and bake finish. The nut has a knurled surface, which helps to prevent it from loosening. It is also heat treated, which makes it more durable. The nut is available in a variety of sizes, and it can be used in a variety of applications.